Estimate covariance of random slope PreviousNext
Mplus Discussion > Multilevel Data/Complex Sample >
 Giselle Guan posted on Saturday, February 08, 2020 - 7:54 am
Dear Dr. Muthen,

I'm trying to conduct multilevel path analysis using Mplus. In the model, I want to test a cross-level interaction using random slope:
s1| Y ON X_within; !the random slope between the DV and IV

Y WITH X_within;
Y ON X_moderator;
s1 on X_moderator; ! The 2-way interaction

X_within with X_moderator;
Question 1: I understand we should covary all exogenous variables (in this case, X_within and X_moderator). Should I also covary s1 and the dependent variable Y?
Question 2: Is s1 treated as a endogenous variable?
Question 3: Should I covary s1 and X_moderator?
Question 4: At the between level, instead of modeling the relationship between X_within and Y per se, I only allow them to covary. I believe in this way I can have a simpler model, which is more likely to converge. Is it correct?

Many thanks!
 Bengt O. Muthen posted on Saturday, February 08, 2020 - 2:04 pm
Because you call it X_within, I assume that you would put this covariate on the Within list. If so, you would not mention it on Between.

1. Yes, you should covary s1 and Y on Between. This is a residual covariance.

2. Yes.

3. No, you already regress s1 on X_moderator.

4. See my intro comment.
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